title: Comparison of bioavailable vanadium in alfalfa rhizosphere soil extracted by an improved BCR procedure and EDTA, HCl, and NaNO₃ single extractions in a pot experiment with V-Cd treatments.
abstract: The BCR sequential extraction procedure was compared with EDTA, HCl, and NaNO3 single extractions for evaluating vanadium bioavailability in alfalfa rhizosphere soil. The amounts of vanadium extracted by these methods were in the following order: BCR (bioavailable V) > EDTA ≈ HCl > NaNO3. Both correlation analysis and stepwise regression were adopted to illustrate the extractable vanadium between different reagents. The correlation coefficients between extracted vanadium and the vanadium contents in alfalfa roots were R NaNO3 = 0.948, R HCl = 0.902, R EDTA = 0.816, and R bioavailable V = 0.819. The stepwise multiple regression equation of the NaNO3 extraction was the most significant at a 95 % confidence interval. The influence of pH, total organic carbon, and cadmium content of soil to vanadium bioavailability were not definite. In summary, both the BCR sequential extraction and the single extraction methods were valid approaches for predicting vanadium bioavailability in alfalfa rhizosphere soil, especially the single extractions.
authors.affiliation: College of Water Sciences, Beijing Normal University, Beijing, 100875, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.forename: Yanguo
authors.initials: Y
authors.lastname: Teng
authors.forename: Rui
authors.initials: R
authors.lastname: Zuo
authors.forename: Liuting
authors.initials: L
authors.lastname: Song
mesh_terms: D001682:Biological Availability; D001692:Biological Transport; D002104:Cadmium / Q000737:chemistry*; D005591:Chemical Fractionation / Q000379:methods*; D004492:Edetic Acid / Q000737:chemistry; D006851:Hydrochloric Acid / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D000455:Medicago sativa / Q000378:metabolism*; D009566:Nitrates / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D058441:Rhizosphere; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000302:isolation & purification / Q000378:metabolism; D013997:Time Factors; D014639:Vanadium / Q000302:isolation & purification* / Q000378:metabolism*
chemical_list: D009566:Nitrates; D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D014639:Vanadium; C031618:sodium nitrate; D004492:Edetic Acid; D006851:Hydrochloric Acid